//请实现一个函数，把字符串 s 中的每个空格替换成"%20"。
//示例 1：
//输入：s = "We are happy."
//输出："We%20are%20happy."

package main
import "fmt"

func replaceSpace(s string) string {
	 newString := ""
	for _,val :=range s {
		if val == ' ' {
			newString+="20%"
		}else{
			newString+=string(val)
		}
	}
	return newString
}

func main(){
	str :="We are happy."
	fmt.Println(replaceSpace(str))
}